There was one dream when Rogue was already in the temple and saw Kitty badly injured. So she touched her to absorb her powers. As Kitty dies from the injuries and the absorption of powers, Rogue said "That one's for stealing my boyfriend in X3, b*tch".

Kinberg also had early plans for a sequence in which older Professor X (Patrick Stewart) and older Magneto (Ian McKellen) went in search of an imprisoned Rogue (Anna Paquin) during the dystopian future. In order to continue sending Wolverine back to the past, they needed Rogue's mimetic power to capture the abilities of the dying Kitty Pryde (Ellen Page). "I wanted to see Rogue because I love Anna [Paquin] and I love the character," Kinberg said. "The other part of it was that I wanted Eric and Charles to go on one last mission together."

The sequence was shot and edited, but removed from the final cut. "It was one subplot too many," said Kinberg. "It was really painful because we all loved and it was really well shot. … What was really interesting was the scene lifted out of the movie really cleanly." That said, elements of that shot still remain in the final theatrical cut of the film. "If you look, you can still see Anna in a reflection," he said.

Pretty sure I found it. It's in the scene when past Xavier meets future Xavier. You'll notice it's super blurry at first, and slowly comes into focus. At some point, when James is facing Patrick, the background changes from lighter (the reshoot) to darker (the original) and you can see something white in the blackness, which could either be Anna's hair or just skin tone. I'm just guessing, but it seems as if James looks slightly different during the scene which tells me part of it is reshot footage. Maybe once the DVD comes out somebody can get a screencap.

The second time I saw the movie, I thought maybe you could still see Anna's hands a whole bunch during the climax, because they're very inconsistent with Kitty's rings, but I'm pretty sure the inconsistency comes from stitching together reshot footage and archive footage of Ellen's hands by Hugh's head.

Again, just a guess. It's always been distracting to me how blurry the Xavier/Xavier scene starts out though!